Dh. Cato et S. Tavener, AMBIENT SEA NOISE DEPENDENCE ON LOCAL, REGIONAL AND GEOSTROPHIC WIND SPEEDS - IMPLICATIONS FOR FORECASTING NOISE, Applied Acoustics, 51(3), 1997, pp. 317-338
Measurements of ambient sea noise in two regions near Australia are pr
esented as a function of wind speed (a) measured locally (at a buoy, d
istance about 120 m), (b) measured at weather stations (distances up t
o 51 km) and (c) predicted from the geostrophic air flow. Estimates of
geostrophic winds from atmospheric pressure contours are used in fore
casting wind speeds. Good correlation of noise with local wind speed w
as observed. Poorer correlations were observed between noise and regio
nal wind speeds or those predicted from geostrophic wind speeds: trend
s were similar but the spread of the data points was greater. Correlat
ions were better when the wind field had minimal influence by the pres
ence of land upwind. The variation of geostrophic wind speed with time
generally followed that of the local wind speed but peaks and troughs
were sometimes displaced in time by a few hours, accounting for some
of the spread of the data. These results suggest that geostrophic wind
, and thus forecasts of wind speeds, would be useful in forecasting se
a noise. (C) 1997 Elsevier Science Ltd.